Sectional sewer-pipe.



UNTTED STATES PATENT orrrci.

SECTIONAL SEWER-PIPE.

Specicatioliof Letters latent.

Patentedlec. 24, 1912.

Application filed October 25, 190.9. ."erialv No. 524,571.

To all 'whomt't may concern: Be it known that I, JOHN M. PHnLAN, a

-citizen of theUnited States, residing at Jackson, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Sectional SewerPipes, of which the following is a specification.

This invention relates t-o'an improvement' in a construction lof concrete pipes, `and the improvement is especially designed fo'r pipes to be employed in connection with-tunnel work. i l

Itis not practicable to lay the ordinary style of concrete pipe in a' tunnel and I have therefore devised a concrete pipe formed of ,a plurality of transverselycurved interlocka pipe formed in accordance'with my inven tion. Fig. 2 is a transverse section on the line 2-2 of Figzvl. Figs'. 3 and t are per-r spective views showing respectively inner' and outer faces of oneof the sect-ions.

' In these drawings -1 represents a transv versely curved block of concrete provided with a plurality ,of transversely arranged lwires 2, which are embedded in the block, a portion of said wires being adjacent the outer face and a portion being adjacent theinner face of the block. One marginal por# tion of the bloekis reduced in width leaving 'a projecting approximately V-shaped tongue 3.- The other edge of the block is channeled out as shown at 4, said channel having the same shape as the tongue 3 land being adapted to receive the tongue ofan adjacent block. By meansof this construction, the various blocks are interlocked along their edges. At

theends each block is cut away on its inner .face as shown at 5, and the tongue 8 and the inner wall of the channel et is also cut away at this end. At the opposite end of the block theouter face is cut away as shown at 6 and the tongue and outer wall of the channel are also cut away. By means of this construcapplying any desired water proofing lining block, and having' al tongue receiving chantion vthe ends ofthe blocksections arev pro# vided with overlapping end projections 7.

It will also henoted from Fig. 1 that they.

gered with respectto each otherv so that the;y g

transverse joints between the various blocks are offset and no cylindrical jointis formed.

great strength can be quickly built in a tunnel, and said pipe can b,J readily:- rendered water proof by'c'enienting all joints, or by to t-he interior ofthe pipe after the same has been completed. It will also be obvious that any desired form of metal reinforcing can be adopted/in connection with these blocks'.

lVhat I claim is: y

1.`In a concrete pipe, a block curved transversely, said block being provided with a beveled tongue along one edge, the said tongue' stopping short of the ends'of the nel formed in the opposite edge, said channel extending the entire length of the block, the inner wall of the channel being cutout at one Y end and the outer wall being removed at the otherl end, and the said block having its opposite end portions cut out upon the-outer a-nd'inner faces, respectively, thereby forming beveled end-portions, each of said end portions being' continuous'with one wall of the said channel. j

2.' A concrete pipe consisting of a plurality of block sections, each block being trans# versely curved, provided with a beveled end portion at. each end, the said end portions being continuous with the outer face of the blockeat o-ne end and with the innr face at `the opposite end, a beveled tongue formed along one side of; the block, and stopping short of the ends of the block, and a channel cut in the opposite-edge of the block and ex- 95 tending theentire length of the block,'as and for the purpose set forth. p

p JOHN M. PHELAN. lVit-nesses I VVLLJ. Sniants, JOHN VJMORAN.

e0 By .means of this construction, a pipe of 

